telephone exchange

by J Steeman telephone exchange Nowadays, there is a variety of inexpensive, yet sophisticated, telephone sets on the market. Not all of these are permitted to be connected to the British Telecom network, however. None the less, two or more of such sets may be used to form a simple, but effective, internal telephone system for the home, an office, or anywhere where a number of people want to communicate from different locations within the same building. 72 The proposed system may, of course, also be built around British Telecom approved sets. Note that the system is intended for up to eight sets each of which generates a pulse code when a number is dialled or keyed in. Facilities A telephone exchange does, of course, more than just connecting one set to another. In fact, this is about the only thing it need not do, because the set with which communication is required is already accessed by the pulses generated when the relevant number is dialled or keyed in. What the exchange is r...